Promotion Effect of Molybdophorsphoric Acid on Oxygen Reduction for Cathode of DMFC

Abstract

Abstract: One kind of heteropolyacids(H₄PMo₁₂O₄₀·xH₂O)is introduced into the cathodic electro-catalyst of direct methanol fuel cell(DMFC) as an additive. The electrochemical result shows that these modified electrodes display an excellent eletrocatalytic activity for oxygen reduction reaction. Using the catalyst modified by PMo₁₂ the catalysis activity for the oxygen reduction reaction can be improved by a factor of 56.3% compared with Pt/C catalyst with the same platinum loading. This effect is also elucidated in the performance of single cell for DMFC. The peak value of power density is 28% higher than DMFC with a conventional electrode. These are may be due to the specific Keggin structure of the PMo₁₂. A better stability is obtained when the PMo₁₂ is introduced into the electrode.

Key words: Molybdophorsphoric acid, Direct methanol fuel cell, Electrode

CLC Number:

O646

TrendMD:

SU Yi, LIU Chang-Peng, SHAN Yi-Bin, LI Xu-Guang, XUE Xin-Zhong, XU Wei-Lin, TIAN Tian, ZHOU Xiao-Chun, XING Wei, LU Tian-Hong. Promotion Effect of Molybdophorsphoric Acid on Oxygen Reduction for Cathode of DMFC[J]. Chem. J. Chinese Universities, 2005, 26(6): 1114.

References

[1] R EN X.M.,Wilson M.S.,Getlesfeld S..J.Electrochem.Soc.[J],1996,143(1):L 12—L 13 [2] Heinzel A.,Barragán V.M..J.Pow er Sources[J],1999,84:70—74 [3] Sco tt K.,Taam a W..J.App l.Electrochem.[J],1998,28:289—297 [4] Kauranen P.S.,Skou E..J.App l.Electrochem.[J],1996,26:909—917 [5] Wasm us S.,Küver A..J.Electroanal.Chem.[J],1999,461:14—31 [6] DU Bing-Chen(杜秉忱),LIU Jin-Hua(刘晶华),XU E Xin-Zhong(薛新忠)et al..Chem.J.Ch inese Un iversities(高等学校化学学报)[J],2004,25(5):917—921 [7] LI Xu-Guang(李旭光),X IN G Wei(邢巍),LU Tian-Hong(陆天虹)et al..Chem.J.Ch inese Un iversities(高等学校化学学报)[J],2003,24(7):1246—1250 [8] Jalan V.,Taylo r E.J..J.Eelectrochem.Soc.[J],1983,130(11):2299—2302 [9] Kim K.T.,Whang J.T.,Kim Y.G.et al..J.Electrochem.Soc.[J],1993,140(1):31—36 [10] Mukerjee S.,Srin ivasan S.,So riaga M.P..J.Electrchem.Soc.[J],1995,142(5):1409—1422 [11] Alt H.,Binder H.,Sandstede G..J.Catalysis[J],1973,28:8—199 [12] Manassen J..J.Cata.[J],1974,33:133—137 [13] GAO Feng(高峰),ZHON G Shun-He(钟顺和).Chem.J.Ch inese Un iversities(高等学校化学学报)[J],2001,22(5):833—835 [14] YAN G Shen-Yong(杨胜勇),X IAO Shen-Xiu(肖慎修),CHEN Tian-Lang(陈天郎)et al..Acta Ch im ica Sin ica(化学学报)[J],2000,58(1):43—49 [15] LIU Jian-Yun(刘建允),CHEN G Long(程龙),DON G Shao-Jun(董绍俊).Chem.J.Ch inese Un iversities(高等学校化学学报)[J],2001,22(10):1641—1644 [16] LI Li-Dong(李丽东),LIWen-Jiang(李文江),SUN Chang-Qing(孙长青).Chem.J.Ch inese Un iversities(高等学校化学学报)[J],2000,21(6):865—869 [17] Dong S.J.,Liu M.J..Electroch im.Acta[J],1994,39(7):947—951 [18] W AN G En-Bo(王恩波),HU Chang-Wen(胡长文),XU Lin(许林).Po lyacid Chem istry In troduction(多酸化学导论)[M],Bei2jing:Chem ical Industry Press,1997:14—237 [19] Zecevic S.K.,Wain righ t J.S.,Litt M.H.et al..J.Electrochem.Soc.[J],1997,144(9):2973—2982